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Quantum 4Front



Dare to move forward.

The 4Front™ is a quiet, more responsive front-wheel drive power chair that features automotive-grade suspension with unprecedented comfort and ride quality. The 4Front’s CASE (Caster Angle Sensor Encoder) technology and SRS (Smooth Ride Suspension) provide stability for smooth obstacle transitions and unmatched driving performance.

Seat Elevation

The 4Front features standard speeds of up to 6 mph in the lowered position, and speeds up to 3.2 mph while elevated at 10″ with our optional safe seat elevation. Standard LED fender lights allow you to see and be seen.


Product Name Quantum 4Front
Weight Capacity 21 Stone 6 lbs (137 kg)
Maximum Speed 6 mph (with lights)
Ground Clearance 7.62 cm at battery tray
Overall Length 101.6 cm (40″)
Overall Width 60.96 cm (24″)
Turning Radius 62.23 cm (24.5 cm)
Standard Controls Q Logic 3
Total Weight (without batteries) 63.5 kg
Battery Requirements 2 x 70 Ah Deep Cycle / Weight: 23.36 kg
Seating TB3 Seating: 12″ x 12″ to 22″ x 22″
Tyres Drive Wheels: 35.56 cm Castor Wheels: 22.86 cm

Please note:

1. Due to manufacturing tolerances and continual product improvement, this specification can be subject to a variance of + or – 3 %. 2. Specification varies with user weight, terrain, battery type, battery condition and tire pressure. 3. Battery weight may vary based on manufacturer. Tested in accordance with ANSI/RESNA, WC Vol. 2, Section 4 and ISO 7176-4 standards. Results derived from theoretical calculations based on battery specifications and drive system performance. Testing conducted at maximum weight capacities. This specification can be subject to a variance of +10%, -5%. The information contained herein is correct at the time of publication; we reserve the right to alter specifications without prior notice.